SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05ab60ef43d74e5c327d56b440a9fb7c7b90986d528de0cc19635e50c52f95d5' 
  AND token = '6iAkjOGQN/s3opU/W/NZtDFC0C+wvuvcdVxgj+Q+8P4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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