Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75398118a06920322494e84f2556fca3050fbc33959b3c1591d07e86568b1b69' 
  AND token = 'IWVkirFAoct0eXEV6uuypp3equcpT8IKB29MCcM1Bhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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