Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '492e2f431f3e205c8b98f5ba77235de355fb2c044f05ee39cdc1f6ffbbf6b3b9' 
  AND token = 'V6XvwBYO7yJoiyihTIf2o5UDKIxmIA+KvDiP42Fw4Ok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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