Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0f1c3419469e6b7c00a598bc9861cd211eedd1ffb7e19e4e933abed00e907bb' 
  AND token = 'Xk+HCcAxhzXRcM/HwAh+Rrwkt+3RosReh3P6eHCoyKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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