Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '877e2ce0c6a3387d1111e5d5579d84fcb73e25e9205317b2d8b93b31d30b661f' 
  AND token = 'yxqBWWIRQ+a7087OPIfkTgEntYq23QC3EFzZ+7WHxxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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