Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ac9e9465b6e4a13039278e5e367695c7ba4f41d427d2b72f0db520acb435dd6' 
  AND token = '4Wk22VXe11i5RFaXajO+JfsGQlArd3cLtrFEfWOAEwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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