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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bad0119d11bb3910bc1693ffcca338c1020a65bb21b8745ed0acca41e511e512' 
  AND token = 'A08ARtC9pmMms3q5VxXg0Nt9Y5NwTItjBpWsX6YSjGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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