Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ec880fef901b71ebd78f14f8b7df76f573d80b052d4b535c471c58aadcfcde97' 
  AND token = 'b6KY+quC9JxdI2cpjYXc1JRxOaGnsSAxInxha12ToAM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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