Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd1297c61a8ed0cfce7a33e2c1d5b0a11e8885a9a1ea7b6b557c9c15cc5c99f1' 
  AND token = '+gR7gCZMYUBIsuF8Fj906z8eWI+q0djKln05Muq8rWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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