Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7e0e1a4db503a776a5932824df748d7c3ff8eae07bb5a3696555945f1d00f9cc' 
  AND token = 'ID0It+ysU8CIxZNI2buxRMftjrnvuU50haFOV2eA/5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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