Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb71f9a73b9eff0b85642789aa79f9cc68bbbd665a1d66e5f342ecfd9601c9fc' 
  AND token = 'UPdmj8FTPMRpEK9hR9zFDnymXNKyKm1HQclDAPKoMh4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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