Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8504ebb2ca93e2d5a9b314383ed7bbebf63646ce77075824dc49721f1c96f64d' 
  AND token = 'S/Bmk7B6SzNH5SlNSTLzC2gHepTDsZvAxpMmd4yYOTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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