Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e915805bafa494e7bda3c6482df340cea1f595be0d460d9c6fa3d661c9765708' 
  AND token = '0s6iU1MWgoe0oWFfIAxeRQv7vEHvGug/oefyxn+LIXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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