Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a65bc46eadd6f549aee1f3ca3982f7fe4afc40e4f00e4ed4e05fe9fa0d546e0c' 
  AND token = 'CIBZ6v+94PNdhTawZTo09Xw/ZVZFiFB8sNTNwyDV4zk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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