Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cebefcd8e813f2c2a12516e863e9122404841da2351e20528033dec64dc7d9a' 
  AND token = 'DllH2f6zEYWEpPtPS8E8VlkWipHXHaxudtU2T1/hsAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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