Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5815a0e2a9cc461e6830d21b99f1071695cfcab1b5f9333e94eeaa809ff8d0ef' 
  AND token = 'L8zcn/ON7gzmz+AZ6ZffI00OVsTFih8a4xOckudcdeM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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