Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28c96e744edb862a776148acd485dfab97a712511a26f4d14966e6457648145d' 
  AND token = 'WvNzsMCG4Qc2nHF4TH6k530xkfe/PZqCOK+3iHXmSnM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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