Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1f26f0f90ecc90ef7d38d206be3647e38383c1b5ce7ab3d4784676bc0334087' 
  AND token = 'Tc2X79LDW5HnyRKrQ2fTRrUV1s8+AnG6E6T/+WrdLis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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