Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09ffc645eac9181621a80299f00753f8315bc944b80b342cfb8142bdd93e8c56' 
  AND token = 'eehb0VB7eayDiZH0c8y2uq298/8VyYfL5K4ipUegzTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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