Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2dbb847ffe23ca9409aed8c5159604280b577228b704948e746588389962858b' 
  AND token = 'yx1Z2fVeqPWal+bHPTSdIcG2OFUp7Nhj4+kJIlXh6mg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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