Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b009a997bc9118b90374c7f8be9bcf3906fdcbdf5850ff991a432aacc202a19d' 
  AND token = 'Ez207tXCMXo40hN7fJ9uwlzXD/R8eYqfhtQn9k4seIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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