Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddadfe226e8fcacdfc2c386a95e7cc4ce3c52cb156bcd5c344548d0ad82ed35b' 
  AND token = 'zOszBTpqLAtMs3aLKXuEQyn12f5caDNseBqMXYbSYug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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