Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9bcfeff64e3e9777dee69148a80a5a5a14df7967de701231e4a33bf1bbe61e6f' 
  AND token = 'I1MwicjyNApifwfGMbROyDo24B/0ilLM9ysOPuZJqas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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