Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd652ec2c0cbc64e9852983ea5960d94caa9acbb55db90090b087b43f37d0a278' 
  AND token = 'pvK6/KzrO+kNVt+xYWQifE5XglMoWZSmRU6VOSiH3pA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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