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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6010ea14ac608791fba999d3c971619fd115b80d8ae5be91433e630e656d0fc5' 
  AND token = 'q7uqFb1CMX1LGPsFCUHc95NG0XkMIKeK/e9YtIa7/bU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}