Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abdfb547e8c16873e1814a3e573609ef5c0166b88b5b930405bbc261c0b52c3b' 
  AND token = 'UyrDt5oh7WKBAWAHXCU6V1aHRiEolArJxPSwpKKs0aw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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