Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8977b91870a5f458bed59eef6485312a51beca8ed8a1af7d60f394b37c9b711' 
  AND token = 'tDV3ty9nBWILLVRBGYdnKDdtqzQPOffBnHc8pOHZX38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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