Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f076dfdf04ec2d25cb1aeb6bd15507cdefb249fa2970749b4c9a6296824347d' 
  AND token = 'BVutWW6rvWO2WTv3WnTLXn2PZOu173MyaLEcTn0irfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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