Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2dec52b9b8109b451c957c234b274821a00910ae8af1b2cea2d464af4b4bb85' 
  AND token = 'z1HFI+TcFnjSvnkK5Ou4wGxCYIREI5FCL9Y3TocINyY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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