Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0cf6bd18765f615ed9492d9b59294cbc52a03a1695f6a82280eaad898ee9576' 
  AND token = '7oBHos50eKFXMk7KR4dK7x0NM6Z8+Qs94sLHxgYGr8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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