Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4954d6a68ee2411105e455ff94fd3bb45a403873be1946591ffba0d13444f8d4' 
  AND token = 'MEO4CvyMT14Bnn8LL7b+63djLTLmrc5XogAfrdBML+4=' 
  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"
    }
  }
}