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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '239a4fcf9cee2245646d7b55d50f11d118a71b310b1edd929dc4040951b1f3b5' 
  AND token = 'xCtUIJN5v8F3wKWZDgKCq1zD29cfwcjTDSZVLcbNzbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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