Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80e29143f251216930d24ad6f789b50b00194cb330c617f6f4113c192ca92154' 
  AND token = 'KIgjVESgw55hHvYBHSU59FtD2BRZwBcDHi255YxK9AY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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