Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '334decba03cbc28cec6d7838285d937211de41a74be2b56bf1aabfa5a3d92db7' 
  AND token = 'OVYAPKycPJitow/Rkq+kfYJj8oy7KCQd6rwyNRYvMjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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