Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cb58a0703049fd430a95f96d7897acd267c413f663cfc75b350df2b60c4fccd' 
  AND token = 'tXF5tcZ8iys5UIz/wPbl/tDY5coDXLZHicXfLOIyqU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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