Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '878035af56fa7f28569e9ed40f99530c5d03c910d00c34f9692c44e3ee3ffcc3' 
  AND token = 'fnzwF5YTYDoh+DJleuOqjztRm/LU5bBfOIMflhE54dE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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