Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b537fb5d01462965db8f34a071380e8109e8e986115fbc57bb7bbfbfbb45df04' 
  AND token = '4v3ENlldgpwuhvPlJT1sRICTaQiHH2eT/NyqHeG5oMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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