Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9d4312037e10177b82ed62d14f7bddd19ca1fe47d854c7ff62dea200a489380' 
  AND token = 'sNg2CCSWSbb8tNJT5fJIA3SOo4LMRhdPZpw0t6WeIp8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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