Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6110a0026ca98dffafceddccbc68bd28fb87537c71da1da9ffcc5cfedd226879' 
  AND token = 'SJcZsZ7V0TF/lNnEL1cSCQ8WSNo3D0jE9Yb8vRAYY8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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