Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d8546066397d09744a27b111f3123c3bb8c9c6dc712e5d89e5c5bde26d51730' 
  AND token = 'LqMgybjQE/HRUy+cV9/Xc6vFjWiaHphNdqocVnDVx6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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