Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6354b7183c42a313b0e7c5e39aa2b7919bab6e2161e74ada362b8571f679722' 
  AND token = 'ITJG/Gv3MnZfWCx/5UvONbmzp58EHRo6PeIDeoEVibU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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