Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a52455f35c38ce152df076c3cbae2d4ce4f85b78efb4d71c824416bdabd33858' 
  AND token = 'ZfqAmuHlvbyV+mv7ff26t05kn2c2PLDugQftSBkqzds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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