Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54e7cada3ec65ce5b9b10e39f88204fc2558d5c5a85ddab62c56c27558c8ff83' 
  AND token = 'aA18VdcOYaIHwgdSo1Gsse6rDcYVSTJcQ8aZIb8TogM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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