SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b75c5622c0882b876eac032c9c3579a708f68abf1a4fe9fea4fe7427d2722841' 
  AND token = 'uxcF2WWhQ3m/gdJx9mMRl6Vy0T/TsRj9YBoWYqzjAB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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