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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '096be9f9e205105069479c052f9d42ddf1fea22cc66c4b750994403cca760116' 
  AND token = 'X4JogYF7wrk6BCPL9YbO8ROqG3qyqN7Wwh/AgKZ9Nw0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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