Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '555723178f3ca7a11e380452b72583e1171e92223a74ba59f387c40a74c04f0b' 
  AND token = 'i7dDiQrziZFpx2lES6K4WWTUYuCJbvm+W3l6sNhsNBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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