Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caed4c20242ce5a4a7390956d1b9da216a61bd0ed52d5f69761a968777bef271' 
  AND token = 'vLnK3/2Vxj0lPYNs2TiMsuaTvuajCqS6kvinG02cD04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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