Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '27a83afafd5d05636b4a59a753c4a3e23a1508fe4b420c85545308fc3e1f40a1' 
  AND token = '1l5ewbu2++6Sk5EfdaGqCNG4TMI+Q5qwqA6DfgFeEFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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