SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a851cda95bce4f496cca1ad28224ac4bd66d0d5a9ea7211ff9afe927e1f6a583' 
  AND token = 'zshDBK3NvNf/iROXFPeIgZIGlc+3LDJHQAAO2PKhxWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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