Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71fae7a7b8a456d40fbce27b3d0cc0772be58fc642fa00bb0612adda71f0c693' 
  AND token = 'B9qb/odx7Ay5PYITgdMIbc6slfB3S62LDBzumwbFMY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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