Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a3730c44ab4956474b626dd3c4c5c55b666f3f717db02cbc734b02ca81717b8' 
  AND token = 'AHZXA1e7qWXMLgMjgqHqDeqVxokaTur7Aobdb7KB2+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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