Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57462e5027955e3a67ce34695b4c3b72cf878cdd1c28213ce02207bf1f393595' 
  AND token = 'S3KUFrMtqxZ3Aq1nfOeGk2y3EXmMMoMmx2wSNmtLDOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}