Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2d39cd397ad534f2c6712503c7d6d76d37b9090255b128893503e9e413e3922' 
  AND token = 'eJl0tChB/WxfixTF6UseXiSTewiB637yXOij5vHebAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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