Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2466b89345ca9ef461825452ec26baab3a487f2c3b8789f95ce5a4ab8966a98' 
  AND token = 'zVyN1OqOOuJEQ9CHUOyL/ieUG+Gkb+7k257Q0N6nTMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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