Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f521b05f72f0805062981354feac2c4f3fde9383df285383f7b248fbcc89e79' 
  AND token = 'p3xuqn9XHHpLwC469aPl6aSAPsM3wgKLoA7iLicAMcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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