SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '86c76ed4562f41724f091108273944e4d85ba8e4db1c749fd73b319528484202' 
  AND token = 'Y4jgv/OKf2zk2QQ0ZtujgwqlZT/+1pf5lHoZuxaOFTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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