Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c0fd450f4bc0ae6c13cd3f488e85d51f131d81cb623fb419b97a8373e7a5e28' 
  AND token = 'ZwCxqx2cLq7RyFPp56gEp/F5NiquuoGarC11MxI/vd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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