Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f477136232a81372b832551f1b957e1cc85eb921662918b3c33b49c2742fdba3' 
  AND token = 'kahfE1wsZlTBOkcTf4S9HxTIAv+YISQXANfKiSuBytY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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