Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c154bb7d3630d6566e069b60c94e2da1d540fbb8b19499512d7102cab2c80da2' 
  AND token = 'UzT5PWuqYl9opYrN7Gz09gG6MvXUDjVbDimS5tGRc6g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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