Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c26f81ee5e8a571e66acdb10a2946ef5f53642d4e33709a96980f5dbea2faba' 
  AND token = 'puHfxdTM1lqvulIkXL3KJemZuqzxO5PuTlrqD/5iR7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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