Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5cfe67592b9b5a896ee9136ade3a3a67bbe5bcbb5dba35c9074020a2ad654136' 
  AND token = '8zMkvZSuDasfulJyrWl3VA06cP6EKafPID5nnlVaoTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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