Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '400ff89c94edfe588b96e38cf2534d90e67e2d57fdb3bf10ec6d53de54eb180a' 
  AND token = 'gv6fUD5HjGR5bB5j5JqWJgydmKR1lRWShD7XI1ckebU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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