Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bda0427c183384d0d1c3babb656470f883efc8f401053de368c474db6e06849' 
  AND token = 'DNTdhIGrM2MikR4UB6sPPuHXqLSA3j+oYxNKz4ljEGY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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