SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dda61f31bad880778b919d4c0b7a6d6acba86f377104f853879c0ff419853d26' 
  AND token = 'kdCJ24Y5/8pBUq2Q6FV5zY0VwTn9Pn165ibug/G/964=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00122

JSON explain

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