Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0ed65f7bef7722a153d36346aeaac1f880d0f985f9d9b8bd10d2030717fedf5' 
  AND token = 'BLsXCMZ8dH/ncVxp7g2TRgWBivrI/raveeHVBEjfdo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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